<!--动态表单（设计器）-->
<template>
  <div class="fancyDynamicTable">
    <el-table
      :data="data"
      :fit="true"
      border
      size="mini"
      :cell-style="{ padding: '5px 0' }"
      :header-cell-style="{ background: '#F5F7FA' }"
      :show-summary="conf['show-summary']"
      :summary-method="sumTotal"
      style="width: 100%"
    >
      <el-table-column
        align="center"
        type="index"
        label="序号"
        width="50px"
        v-if="conf.showIndex"
        fixed="left"
      />
      <el-table-column
        align="center"
        :prop="item.id"
        v-for="(item, index) in conf.columns"
        :key="index"
        min-width="150px;"
      >
        <template slot="header">
          {{ tableColumnLables[index] }}
        </template>
        <template slot-scope="scope">
          <slot name="item" :rowScope="scope" :item="item"></slot>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>
<script>
  export default {
    name: 'fancyDynamicViewTable',
    props: ['data', 'conf'],
    data() {
      return {
        tableColumns: [],
        tableColumnLables: []
      };
    },
    mounted() {
      this.conf.columns.forEach((element) => {
        this.tableColumnLables.push(element.label);
        let tableCol = {};
        Object.assign(tableCol, element);
        this.tableColumns.push(tableCol);
      });
    },
    methods: {
      sumTotal(param) {
        const { columns, data } = param;
        const sums = [];
        columns.forEach((column, index) => {
          if (index === 0) {
            sums[index] = this.conf['sum-text'];
            return;
          }
          const values = data.map((item) => Number(item[column.property]));
          if (!values.every((value) => isNaN(value))) {
            sums[index] = values.reduce((prev, curr) => {
              const value = Number(curr);
              if (!isNaN(value)) {
                return prev + curr;
              } else {
                return prev;
              }
            }, 0);
            sums[index] += ' ' + this.conf['summary-text'];
          } else {
            sums[index] = '';
          }
        });

        return sums;
      }
    }
  };
</script>
<style scoped>
  .fancyDynamicTable {
    /* widows: 100%; */
    padding: 10px;
  }
  .column-buttons {
    margin-top: 15px;
    text-align: center;
  }
  .optIcon {
    font-size: 18px;
    margin-right: 5px;
    cursor: pointer;
  }
</style>
